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Causes

Hyperviscosity can occur when the percentage of red blood cells (RBCs) in the infant's blood called the "hematocrit," is greater than 65%. The problem can occur as a result of conditions that develop before birth. These may include:

Twin-twin transfusion syndrome

The extra RBCs can block the flow of blood in the smallest blood vessels. This may lead to tissue death from lack of oxygen. This blocked blood flow can affect all organs, including the kidneys, lungs, and brain.

Creatinine

Treatment

The baby will be monitored for complications of hyperviscosity. An exchange transfusion may be needed. This is done to lower the amount of red blood cells that are moving through the baby's blood vessels.

Other treatment may include increasing body fluids.

Outlook (Prognosis)

The outlook is good for infants with mild hyperviscosity. Good results are also possible in infants who receive treatment for severe hyperviscosity.

Some children may have mild developmental changes. Parents should contact their health care provider if they think their child shows signs of delayed development.